Structural evolution of a 2205 duplex stainless steel between 500 degrees C and 800 degrees C and fitting corrosion resistance

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Title

Structural evolution of a 2205 duplex stainless steel between 500 degrees C and 800 degrees C and fitting corrosion resistance (EN)

Creator

Fourlaris, G (EN)

Kordatos, JD (EN)

Papadimitriou, G (EN)

Type

journalArticle (EN)

Partial document
Publication in journal (EN)

Article
Scientific article (EN)

Issued

2014-03-01T01:49:04Z

1999 (EN)

Year

1999 (EN)

Description

The cooling rate of a duplex stainless steel from high temperature (region of stability of alpha-ferrite) down to the ambient temperature is critical for the mutual formation of its constituent phases, i.e. ferrite and austenite, and for their content in alloying elements. Therefore it is expected that cooling rates will affect indirectly the transformation and precipitation phenomena occuring during subsequent heat treatment. The aim of this study is to investigate the influence of the cooling rate on the transformation behavior of a SAF 2205 duplex stainless steel subjected to heat treatments in the temperature range between 500 degrees C to 800 degrees C. The specimens were solution annealed at 1100 degrees C and then cooled in air, oil or water. They were subsequently subjected to isothermal heat treatment for 5 hours at temperatures of 500, 600, 700 and 800 degrees C. The structural evolution was investigated using several techniques, among them optical, scanning and transmission electron microscopy coupled with extensive EDS X-ray microanalysis and selected area electron diffraction pattern analysis. (EN)

Scientific field

Materials Science, Multidisciplinary (EN)

Engineering and Technology
Materials Engineering (EN)

Subject

microstructure (EN)

CF8 (EN)

pitting (EN)

solution annealing (EN)

aging (EN)

duplex stainless steels (EN)

Journal

HIGH NITROGEN STEELS '98 (EN)